Manual breast pump

Abstract

A manual breast pump includes: a body having a communicating part that communicates with space surrounded by a hood placed on a breast; a diaphragm that deforms to generate a negative pressure in the communicating part; and a handle for operation that approaches and separates from the body, wherein a colliding part, against which at least the handle and the body collide before directly contacting each other, is provided in at least a region of any of the handle, the body, and the diaphragm, the colliding part is integrally made of a same material as a material of a region in which the colliding part is arranged, and has a damper structure that absorbs an impulsive force or reduces propagation of the impulsive force and/or a cover structure in which the colliding part is covered via a gap so as not to be exposed to an outside.

The invention claimed is: 
     
       1. A manual breast pump comprising:
 a body having a communicating part configured to communicate with space surrounded by a hood placed on a breast; 
 a diaphragm configured to deform to generate a negative pressure in the communicating part; 
 a handle for operation configured to approach and separate from the body to deform the diaphragm, the handle having a lift part that is arranged above the diaphragm to lift and thereby deform the diaphragm and further having a lever part that turns from the lift part and extends adjacent a side surface of the body, the lever part approaching the body when the lift part lifts and thereby deforms the diaphragm in order to generate the negative pressure; and 
 an arm that extends from the body, having a support shaft part that is in a shaft shape; wherein 
 the handle has a fulcrum portion at which the handle is rotatably attached to the support shaft part, 
 the fulcrum portion of the handle is positioned between the lift part and the lever part such that the fulcrum portion of the handle is a fulcrum around which the handle is configured to pivot, 
 a colliding part, against which a region of the handle is configured to collide before the lever part of the handle and the body directly contact each other when the lever part approaches the body, is provided in at least a region of either the body or the diaphragm wherein the region of the handle that is configured to collide with the colliding part is defined as a collided region, 
 the colliding part is integrally made of a same material as a material of at least the region of either the body or the diaphragm that the colliding part is provided in, and 
 the colliding part has a damper structure configured to absorb an impulsive force generated when making a collision against the collided region or to reduce propagation of the impulsive force. 
 
     
     
       2. The manual breast pump according to  claim 1 , wherein
 the lever part of the handle has an elastic force in a direction in which the handle approaches the body, and exhibits the elastic force to be capable of contacting the body after the colliding part collides against the collided region. 
 
     
     
       3. The manual breast pump according to  claim 1 , wherein
 the colliding part has a through-hole, and a colliding side relative to the through-hole is deformable toward a side of the through-hole during the collision against the collided region. 
 
     
     
       4. The manual breast pump according to  claim 1 , wherein
 the colliding part is provided only in the region of the diaphragm, and 
 the region of the diaphragm is located at a side close to the lever part of the handle. 
 
     
     
       5. The manual breast pump according to  claim 1 , wherein
 the lift part directly connects to the diaphragm, and 
 the lever part has a designed shape to fit user's fingers. 
 
     
     
       6. The manual breast pump according to  claim 1 , wherein
 the colliding part is structured to be covered via a gap so as to be spaced from an outside via the gap when the handle collides against the colliding part. 
 
     
     
       7. The manual breast pump according to  claim 6 , wherein
 the handle has a cavity part opened toward a side of the body, and 
 the colliding part is arranged inside the cavity part at least during the collision against the collided region. 
 
     
     
       8. The manual breast pump according to  claim 7 , wherein
 the handle is rotatable about a support shaft part of the body, and 
 the colliding part is provided around the support shaft part of the body. 
 
     
     
       9. The manual breast pump according to  claim 1 , wherein
 the body has a base part that has higher rigidity than the diaphragm and serves as a base to which the diaphragm is connected, 
 the colliding part is provided in the diaphragm, and 
 the impulsive force generated when the colliding part makes the collision against the collided region is configured to act on a connecting region of the diaphragm that is connected to the base part. 
 
     
     
       10. The manual breast pump according to  claim 9 , wherein
 the colliding part has a protrusion that protrudes from a circumference of the connecting region surrounding the base part. 
 
     
     
       11. The manual breast pump according to  claim 9 , wherein
 the colliding part has a protrusion that protrudes from the connecting region so as to be capable of colliding against the handle. 
 
     
     
       12. The manual breast pump according to  claim 11 , wherein
 the colliding part has a notched part or a concave part at a root or a halfway point thereof in a direction in which the protrusion extends. 
 
     
     
       13. A manual breast pump comprising:
 a body having a communicating part configured to communicate with space surrounded by a hood placed on a breast; 
 a diaphragm configured to deform to generate a negative pressure in the communicating part; 
 a handle for operation configured to approach and separate from the body to deform the diaphragm, the handle having a lift part that is arranged above the diaphragm to lift and thereby deform the diaphragm and further having a lever part that turns from the lift part and extends adjacent a side surface of the body, the lever part approaching the body when the lift part lifts and thereby deforms the diaphragm in order to generate the negative pressure; and 
 an arm that extends from the body, having a support shaft part that is in a shaft shape; wherein 
 the handle has a fulcrum portion at which the handle is rotatably attached to the support shaft part, 
 the fulcrum portion of the handle is positioned between the lift part and the lever part such that the fulcrum portion of the handle is a fulcrum around which the handle is configured to pivot, 
 a colliding part, against which the handle is configured to collide before the lever part of the handle and the body directly contact each other when the lever part approaches the body, is provided in at least a region of the handle, 
 the colliding part is integrally made of a same material as a material of at least the region of the handle, and 
 the colliding part has a damper structure configured to absorb an impulsive force generated when making a collision or to reduce propagation of the impulsive force. 
 
     
     
       14. The manual breast pump according to  claim 13 , wherein
 the colliding part is a protruding part that protrudes from the handle, 
 at least a part of the collided region is a connecting region of the diaphragm, and 
 the colliding part is configured to collide against a surface in a thickness direction of a collided region. 
 
     
     
       15. The manual breast pump according to  claim 13 , wherein
 the colliding part is structured to be covered via a gap so as to be spaced from an outside via the gap when the handle collides against the colliding part. 
 
     
     
       16. The manual breast pump according to  claim 13 , wherein
 the handle has a cavity part opened toward a side of the body, and 
 the colliding part is arranged inside the cavity part at least during the collision. 
 
     
     
       17. The manual breast pump according to  claim 13 , wherein
 the colliding part has a through-hole, and a colliding side relative to the through-hole is deformable toward a side of the through-hole during the collision. 
 
     
     
       18. The manual breast pump according to  claim 13 , wherein
 the lift part directly connects to the diaphragm, and 
 the lever part has a designed shape to fit user's fingers.